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流域不透水面遥感提取及尺度依赖性研究

DOI: 10.13577/j.jnd.2015.0109, PP. 61-65

Keywords: 流域,不透水面,遥感信息提取,九龙江流域

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Abstract:

流域不透水面能直接影响非点源污染的转移模式,降低受纳水体质量,对生态环境造成巨大压力,是流域生态水文模型的一个重要参数。针对流域不透水面遥感信息提取及尺度依赖性问题,从像元、亚像元两个尺度进行了研究,论述了流域初始分类与样本获取、局部不透水面信息提取和亚像元级不透水面覆盖率计算的技术方法。以福建省九龙江流域为例,对2010年不透水面空间格局进行了提取,其总体精度达到82.81%,验证了本文研究成果的实用性。

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